Peters



(No Model.)

J. H, TILLEY Transmitterfo-r Fire Alarm Telegraphs. No. 230,508. Patented July 27,1880.

TOR:

BY Z/ a Q I ATTORNEYS.

"-PETERS. PNOTO-UTHOGRAPHER, WASHINGTON. D O.

UNITED I STATES PATENT OFFICE.

JOHN H. TILLEY, OF NEWPORT, RHODE ISLAND.

TRANSMITTER FOR FIRE-ALARM TELEGRAPHS.

SPECIFICATION forming part of Letters Patent No. 230,508, dated July 27', 1880.

Application filed May 5, 1880. (N model.)

To all whom it may concern:

Be it known that I, JoHN HENRY TILLEY, of Newport, in the county of Newport and State of Rhode Island, have invented a new and useful Improvement in Transmitters for Fire- Alarm Boxes, of which the following is a specificatiou.

Heretofore, where bells have been used for giving notice of fire, either bya general alarm or by striking the number of the signal-box, much confusion has resulted from indistinct alarms or errors in counting. In some cases the fire-alarm telegraph has been arranged to strike the number of the box, and bells not connected with the system are rung by hand, and it is of frequent occurrence that the boxnumber is not heard at all except by the bellringers.

The object of my invention is to construct transmitters for fire-alarm boxes that will first act to give a general alarm, and, after an interval, strike the box-number and repeat the number, as required, thus calling attention, first, to the fact of the fire by an alarm which is likely to be heard, and then giving the locality.

My invention consists in a transmittingwheel provided with two disks that are formed with circuit-closin g points on their peripheries and insulated from each other, which wheel is connected with the gearing of the box, and is formed to shift the circuit-closing spring automatically from one disk to the other at each complete revolution.

The construction and operation will be hereinafter set forth in detail with reference to the accompanying drawings, wherein- Figure 1 is a front elevation of my improved transmitter. Fig. 2 is a side view of the transmitting-wheel in reverse of Fig. 1. Figs. 3 and 4 are edge views of the wheel, showing the automatic switch.

Similar letters of reference indicate corresponding parts- A. is the clock-work of the signal-box, driven by a spring, as usual. to is an arm engaging with wheel I) of the train to stop the transmitter at every revolution of wheel I). c is the finger-lever for releasing arm a. d is the transmitter-wheel, attached on an arbor making two revolutions to one of wheel I). e is a post having metallic connection with binding-screw f, and carrying the spring-arm 9, that bears on the wheel (1. his the binding-screwin connection with the clock-work.

The wheel d is formed by two disks or rings, '5, of metal, attached upon the arbor and separated by a ring or disk, 70, ofnon-conducting material. In the periphery of disk k there are formed two annular grooves, (shown most clearly in Figs. 3 and 4,) which grooves extend parallel to each other except at one point, where they cross. Between these grooves, back of the point of crossing, is pivoted a guide or switch-block, Z, which has a pointed end in the direction the wheel revolves, thatmaybe turned to cut off either groove.

The rings t are formed with circuit-closing points on their outer edges, arranged in any desired manner. As shown, the inner ring *L is formed to give successive contacts at regular intervals, while the outer ring is arranged to 7 give the box-number four times in succession.

The spring-arm-g is provided at its end with apin, g, adapted for entering either groove of disk is. The end of arm g is preferably formed with three fingersthe center finger, carrying the pin g, and the outerfingers, making contact with either disk 03, according as to which groove. the pin g is in.

The operation is as follows: The pin 9' being in the inner groove of wheel (1, the arm 9 will be in contact with the inner ring "6, and the lever 0 being pressed down to start the transmitter, the first revolution of the wheel (I will give a general-alarm signal. The switch-block 1 should be normally set, as shown in Fig. 3, to carry the pin g from the inner to the outer groove, so that when wheel (I has completed one revolution the arm 9 will be shifted into contact with the outer disk '5, and the second revolution of the transmitter-wheel will give the box-number upon the bell. As the pin 9 moves past the block lit comes into contact with the rear portion, and throwsthe point to the other position, as shown in Fig. 4, so that at the second revolution the pin g will return to the inner groove, and also return block I to 2. In transmitters for fire-alarm boxes, the wheel d, formed of the metallic disks or rings 13 and insulating disk 70, having a doublegrooved periphery and switch-block, Z, combined with the clock-work and circuit-closing arm g, having the pin g, substantially as and for the purposes specified.

JOHN HENRY TILLEY.

Witnesses:

DANIEL P. BULL, CHARLES S. Bron. 

